A rock composed of fine-grained pyroclastic particles is called:
a) Tuff
b) Pumice
c) Scoria
d) Rhyolite
e) Obsidian
Answer: a) Tuff
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Phentermine, also called Fastin, is an example of which type of amine?
A) primary aliphatic B) primary aromatic C) tertiary aliphatic D) tertiary aromatic
A(n) ________ is a sharp, knife-edged ridge that forms between two valley glaciers
A) horn B) arête C) col D) moraine
In terms of topography, the deepest soils are ________
A) on flat land B) on the sides of hills C) where erosion is fastest D) on steep hills with sandstone bedrock E) on random locations on the landscape
These temperature data show that since the 1880s
A. temperatures have risen 6° C. B. insufficient data exists to definitively state global warming has occurred. C. temperatures have remain unchanged. D. temperatures have risen around one degree C.